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Without using Trigonometric Tables evalu...

Without using Trigonometric Tables evaluate the following :- `sec^2 10^@-cot^2 80^@+(sin15^@cos75^@+cos15^@sin75^@)/(costhetasin(90^@-theta)+sinthetacos(90^@-theta)` .

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Without using Trigonometric Tables evaluate the following :- sec70^@sin20^@-cos20^@cosec70^@ .

Without using Trigonometric Tables evaluate the following :- (sec50^@sin40^@+cos40^@cosec50^@)

Without using Trigonometric Tables evaluate the following :- (cosec^2 67^@-tan^2 23^@)/(sin^2 17^@+sin^2 73^@)+(sin59^@)/(cos31^@) .

Without using Trigonometric Tables evaluate the following :- (cos35^@)/(sin55)+(sin11^@)/(cos79^@)-cos28^@ cosec62^@ .

Without using Trigonometric Tables evaluate the following :- (2cos38^@)/(sin52^@)+(4tan40^@)/(cot50^@)+(12sec66^@)/(cosec24^@)

Without using Trigonometric tables, evaluate:- (cos^2 20^@+cos^2 70^@)/(sin^2 59^@+sin^2 31^@) .

Without using Trigonometric Tables evaluate the following :- sinthetacostheta-(sinthetacos(90^@-theta) costheta)/(sec(90^@-theta))-(costhetasin(90^@-theta)sintheta)/(cosec(90^@-theta)) .

Without using Trigonometric Tables evaluate the following :- (sec^2 54^@-cot^2 36^@)/(cosec^2 57^@-tan^2 33^@) +2sin^2 38^@ sec^2 52^@-sin^2 45^@ .

Without using Trigonometric Tables evaluate the following :- (2cos67^@)/(sin23^@)-(tan40^@)/(cot50^@)-cos0^@+tan15^@tan25^@tan60^@tan65^@tan75^@ .

Without using Trigonometric Tables evaluate the following :- ((tan20^@)/(cosec70^@))^2+((cot20^@)/sec70^@)+2tan15^@tan37^@tan53^@tan60^@tan75^@ .

MBD-INTRODUCTION TO TRIGONOMETRY-EXERCISE
  1. Without using Trigonometric Tables evaluate the following :- (sin^2 35...

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  2. Without using Trigonometric Tables evaluate the following :- (sec^2 5...

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  3. Without using Trigonometric Tables evaluate the following :- sec^2 10...

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  4. Without using Trigonometric Tables evaluate the following :- (sec^2(90...

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  5. If sin 3theta = cos (theta-6^@) where 3theta and theta-6^@ are acute...

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  6. If sin A = cos B, both A and B are acute angles, find A + B.

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  7. If cosec 2A = sec (A + 6^@) where 2A and A + 6^@ are acute angles find...

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  8. If sin 5theta = cos 4theta where 5theta and 4theta are acute angles, f...

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  9. If tan 2theta = cot 4theta where 2theta and 4theta are acute angles. F...

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  10. If cos 3theta= sin (theta - 6^@) where 3theta and theta-6^@ are acute ...

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  11. If A, B, C are interior angles of triangleABC, prove that :- sin((A+C)...

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  12. If A, B, C are interior angles of triangleABC, prove that :- cos((B+C)...

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  13. If A, B, C are interior angles of triangleABC, prove that :- cos^2(A/2...

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  14. If A, B, C are interior angles of triangleABC, prove that :- 1+tan^2((...

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  15. If A, B, C are interior angles of triangleABC, prove that :- 1+cot^2((...

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  16. If A, B, C are interior angles of triangleABC, prove that :- tan((A+B...

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  17. Match the following : .

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  18. Prove that sec A (1 -sin A) (sec A + tan A) =1.

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  19. Prove the following : (cot A - cos A)/(cot A + cos A)= (cosec A -1)/(c...

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  20. Prove the following : (sintheta-costheta+1)/(sintheta+costheta-1)=(1)/...

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